A dew condensation prevention test chamber

Abstract

The utility model discloses a kind of anti-condensation test boxes, including first casing, first casing is fixedly connected with first pressure-bearing shell in, first pressure-bearing shell is fixedly connected with heat preservation layer in, heat preservation layer is fixedly connected with second pressure-bearing shell in, first casing is fixedly connected with second casing, second casing is fixedly connected with nitrogen tank in, nitrogen tank output end is fixed with pressure-reducing valve, pressure-reducing valve output end is fixed with pressure gauge, pressure gauge output end is fixed with first electric proportional valve;The utility model passes through into nitrogen to second pressure-bearing shell, to discharge the water vapor containing air in second pressure-bearing shell, so that in cooling process can ensure that product surface does not produce condensation, to improve the reliability of test result, by adjusting first electric proportional valve and second electric proportional valve to control admission, exhaust capacity, to ensure that second pressure-bearing shell internal pressure is constant, to simulate the real environment required by product test, improve the accuracy of test result.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, and in particular to an anti-condensation test chamber. Background Technology

[0002] A test chamber is a device used for product reliability testing, providing a stable temperature and humidity environment for the test. In existing test chambers, when the product surface temperature is lower than the ambient air temperature, moisture in the air easily condenses on the product surface, causing condensation. Some product testing standards are extremely stringent, explicitly stipulating that condensation is absolutely not allowed on the product surface throughout the entire testing process. If condensation occurs, it means the testing process does not meet the specifications, and the test results will be inaccurate due to interference. However, existing test chambers generally lack effective anti-condensation functions, thus failing to meet the testing needs of products with strict requirements for condensation control. Utility Model Content

[0003] The purpose of this invention is to provide an anti-condensation test chamber to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an anti-condensation test chamber, comprising a first housing, a first pressure-bearing shell fixedly connected inside the first housing, a heat insulation layer fixedly connected inside the first pressure-bearing shell, a second pressure-bearing shell fixedly connected inside the heat insulation layer, a second housing fixedly connected to the first housing, a nitrogen tank fixedly connected inside the second housing, a pressure reducing valve fixedly connected to the output end of the nitrogen tank, a pressure gauge fixedly connected to the output end of the pressure reducing valve, a first electric proportional valve fixedly connected to the output end of the pressure gauge, and an air inlet pipe fixedly connected to the output end of the first electric proportional valve, and the air inlet pipe is connected to the second pressure-bearing shell.

[0005] Preferably, a second electric proportional valve is fixedly connected to the first housing, the input end of the second electric proportional valve is connected to and fixedly connected to a first exhaust pipe, and the first exhaust pipe is connected to and fixedly connected to the second pressure-bearing housing, and the output end of the second electric proportional valve is connected to and fixedly connected to a second exhaust pipe.

[0006] Preferably, a first door is hinged to the first housing, and an observation window is provided on the first door.

[0007] Preferably, a heater is fixedly connected inside the second pressure-bearing housing.

[0008] Preferably, a motor is fixedly connected to the first housing, a rotating shaft is fixedly connected to the output end of the motor, a fan is fixedly connected to the rotating shaft, and the fan is disposed inside the second pressure-bearing housing.

[0009] Preferably, a dew point sensor and a differential pressure sensor are fixedly connected to the first housing, and the input terminals of both the differential pressure sensor and the dew point sensor are conductively connected to the second pressure-bearing housing.

[0010] Preferably, a compressor is fixedly connected inside the second housing, a condenser is conductively connected to the output end of the compressor, an evaporator is conductively connected to the output end of the condenser, and the evaporator is fixedly connected inside the second pressure-bearing housing, with the output end of the evaporator conductively connected to the input end of the compressor.

[0011] Preferably, a heat dissipation vent is provided on the second casing at the position corresponding to the condenser.

[0012] Preferably, a second door is hinged to the second housing, and a control panel is fixedly connected to the second door. The control panel is electrically connected to a pressure reducing valve, a pressure gauge, a first electric proportional valve, a second electric proportional valve, a heater, a motor, a compressor, a dew point sensor, and a differential pressure sensor.

[0013] The present invention provides an anti-condensation test chamber, the advantages of which are as follows: By introducing nitrogen into the second pressure-bearing shell, the moisture-containing air in the second pressure-bearing shell is discharged, ensuring that no condensation occurs on the product surface during the cooling process, thereby improving the reliability of the test results. By adjusting the first and second electric proportional valves to control the intake and exhaust volume, the pressure inside the second pressure-bearing shell is kept constant, thereby simulating the real environment required for product testing and improving the accuracy of the test results. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the overall main structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall front view sectional structure of this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of the structure of region A in the middle.

[0019] In the diagram: 1. First housing; 11. First pressure-bearing housing; 12. Insulation layer; 13. Second pressure-bearing housing; 14. First door; 15. Observation window; 16. Second housing; 17. Heat dissipation vent; 18. Second door; 19. Control panel; 2. Nitrogen tank; 21. Pressure reducing valve; 22. Pressure gauge; 23. First electric proportional valve; 24. Inlet pipe; 3. Second electric proportional valve; 31. First exhaust pipe; 32. Second exhaust pipe; 4. Heater; 5. Motor; 51. Shaft; 52. Fan; 6. Compressor; 61. Condenser; 62. Evaporator; 7. Dew point sensor; 8. Differential pressure sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see the appendix Figure 1 -Appendix Figure 4This utility model provides an embodiment of an anti-condensation test chamber, comprising a first housing 1, a first pressure-bearing shell 11 fixedly connected inside the first housing 1, a heat-insulating layer 12 fixedly connected inside the first pressure-bearing shell 11, a second pressure-bearing shell 13 fixedly connected inside the heat-insulating layer 12, a second housing 16 fixedly connected to the first housing 1, a nitrogen tank 2 fixedly connected inside the second housing 16, a pressure reducing valve 21 connected to the output end of the nitrogen tank 2, a pressure gauge 22 connected to the output end of the pressure reducing valve 21, a first electric proportional valve 23 connected to the output end of the pressure gauge 22, and an air inlet pipe 24 connected to the output end of the first electric proportional valve 23. The inlet pipe 24 is connected to the second pressure-bearing housing 13. The first pressure-bearing housing 11 and the second pressure-bearing housing 13 are used to improve the pressure-bearing capacity of the first housing 1. The insulation layer 12 is used for insulation. The second housing 16 is the equipment room. The nitrogen tank 2 is the nitrogen source. The pressure reducing valve 21 is used to regulate the gas supply pressure. The pressure gauge 22 is used to monitor the gas supply pressure. The first electric proportional valve 23 is used to control the gas supply flow. The inlet pipe 24 is used to deliver nitrogen to the second pressure-bearing housing 13. The second electric proportional valve 3 is fixedly connected to the first housing 1. The input end of the second electric proportional valve 3 is connected to the first exhaust pipe 31, and the first exhaust pipe 31 is connected to the second pressure-bearing housing 13. The output end of the second electric proportional valve 3 is connected to a second exhaust pipe 32. The second electric proportional valve 3 is used to control the exhaust flow rate. The first exhaust pipe 31 is used to send air into the second electric proportional valve 3, and the second exhaust pipe 32 is used to exhaust the air in the second electric proportional valve 3. A first door 14 is hinged to the first housing 1. An observation window 15 is provided on the first door 14. The first door 14 is used to close the first housing 1, and the observation window 15 is used to facilitate observation of the internal condition of the second pressure-bearing housing 13. A heater 4 is fixedly connected inside the second pressure-bearing housing 13. The heater 4 is used to heat the inside of the second pressure-bearing housing 13. The first housing 1 is fixedly connected to... A motor 5 is provided, and a rotating shaft 51 is fixedly connected to the output end of the motor 5. A fan wheel 52 is fixedly connected to the rotating shaft 51 and is located inside the second pressure-bearing housing 13. The motor 5 drives the rotating shaft 51, which in turn drives the fan wheel 52, which promotes airflow circulation within the second pressure-bearing housing 13. A dew point sensor 7 and a differential pressure sensor 8 are fixedly connected to the first housing 1. The input ends of both the differential pressure sensor 8 and the dew point sensor 7 are connected to the second pressure-bearing housing 13. The dew point sensor 7 is used to monitor the dew point value within the second pressure-bearing housing 13, and the differential pressure sensor 8 is used to monitor the differential pressure value within the second pressure-bearing housing 13.A compressor 6 is fixedly connected inside the second housing 16. A condenser 61 is conductively connected to the output end of the compressor 6, and an evaporator 62 is conductively connected to the output end of the condenser 61. The evaporator 62 is fixedly connected inside the second pressure-bearing housing 13, and its output end is conductively connected to the input end of the compressor 6. The refrigerant inside the evaporator 62 evaporates under low pressure, absorbing heat from the surrounding air, thereby achieving a cooling effect on the inside of the second pressure-bearing housing 13. After evaporation, the refrigerant changes from a liquid to a gaseous state. The compressor 6 draws in the low-temperature, low-pressure gaseous refrigerant from the evaporator 62 and compresses it, increasing its pressure and temperature, transforming it into a high-temperature, high-pressure gaseous refrigerant. To create conditions for the liquefaction of the refrigerant in the condenser 61, the condenser 61 is used for heat dissipation of the refrigerant. A heat dissipation vent 17 is provided on the second housing 16 at a position corresponding to the condenser 61, for ventilation and heat dissipation of the condenser 61. A second door 18 is hinged to the second housing 16, and a control panel 19 is fixedly connected to the second door 18. The control panel 19 is electrically connected to the pressure reducing valve 21, pressure gauge 22, first electric proportional valve 23, second electric proportional valve 3, heater 4, motor 5, compressor 6, dew point sensor 7, and differential pressure sensor 8. The second door 18 is used to close the second housing 16, and the control panel 19 is used to control the operation of the equipment.

[0022] Working Principle: When using this invention, the required low-temperature environment value for the product is set, and the compressor 6 starts working, refrigerating through the evaporator 62. The nitrogen inlet pressure is adjusted by the pressure reducing valve 21, and the pressure is monitored by the pressure gauge 22. The first electric proportional valve 23 is opened, and nitrogen from the nitrogen tank 2 enters the second pressure-bearing housing 13 through the inlet pipe 24. The motor 5 is started, driving the impeller 52 via the shaft 51. The second electric proportional valve 3 is then activated, and air from the second pressure-bearing housing 13 enters the second electric proportional valve 3 through the first exhaust pipe 31 and is then discharged through the second exhaust pipe 32. The parameters of the dew point sensor 7 and the differential pressure sensor 8 are set. The first electric proportional valve 23 and the second electric proportional valve 3 control the nitrogen inlet and exhaust volume through a program until the dew point and differential pressure reach the set parameter values. The compressor 6 continues to work, keeping the entire product in the required low-temperature environment. The cooling process continues until the desired set temperature is reached. Nitrogen gas is continuously introduced throughout the cooling process, and the pressure of the second pressure-bearing housing 13 is kept constant. This ensures that the desired dew point value is reached first, and then the surface temperature of the product is reduced to the corresponding temperature range, thereby achieving the goal of preventing condensation on the product surface during the entire cooling process. The first pressure-bearing housing 11 and the second pressure-bearing housing 13 are used to improve the pressure-bearing capacity of the first housing 1. The first door 14 is used to close the first housing 1, and the second door 18 is used to close the second housing 16. The insulation layer 12 is used for insulation. The observation window 15 is used to facilitate observation of the internal condition of the second pressure-bearing housing 13. The second housing 16 is the equipment room. The control panel 19 is used to control the operation of the equipment. The condenser 61 is used for heat dissipation of the refrigerant. The heat dissipation vent 17 is used for ventilation and heat dissipation of the condenser 61. The heater 4 is used to heat the interior of the second pressure-bearing housing 13.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An anti-condensation test chamber, comprising a first housing (1), characterized in that: A first pressure-bearing shell (11) is fixedly connected inside the first housing (1). An insulation layer (12) is fixedly connected inside the first pressure-bearing shell (11). A second pressure-bearing shell (13) is fixedly connected inside the insulation layer (12). A second housing (16) is fixedly connected to the first housing (1). A nitrogen tank (2) is fixedly connected inside the second housing (16). A pressure reducing valve (21) is connected to the output end of the nitrogen tank (2). A pressure gauge (22) is connected to the output end of the pressure reducing valve (21). A first electric proportional valve (23) is connected to the output end of the pressure gauge (22). An air inlet pipe (24) is connected to the output end of the first electric proportional valve (23). The air inlet pipe (24) is connected to the second pressure-bearing shell (13).

2. The anti-condensation test chamber according to claim 1, characterized in that: A second electric proportional valve (3) is fixedly connected to the first housing (1). The input end of the second electric proportional valve (3) is connected to a first exhaust pipe (31), and the first exhaust pipe (31) is connected to the second pressure-bearing housing (13). The output end of the second electric proportional valve (3) is connected to a second exhaust pipe (32).

3. The anti-condensation test chamber according to claim 2, characterized in that: The first housing (1) is hinged to a first door (14), and the first door (14) is provided with an observation window (15).

4. The anti-condensation test chamber according to claim 2, characterized in that: A heater (4) is fixedly connected inside the second pressure-bearing housing (13).

5. The anti-condensation test chamber according to claim 3, characterized in that: A motor (5) is fixedly connected to the first housing (1), a rotating shaft (51) is fixedly connected to the output end of the motor (5), a fan (52) is fixedly connected to the rotating shaft (51), and the fan (52) is located inside the second pressure-bearing housing (13).

6. The anti-condensation test chamber according to claim 5, characterized in that: A dew point sensor (7) is fixedly connected to the first housing (1), and a differential pressure sensor (8) is fixedly connected to the first housing (1). The input terminals of the differential pressure sensor (8) and the dew point sensor (7) are both connected to the second pressure-bearing housing (13).

7. The anti-condensation test chamber according to claim 1, characterized in that: A compressor (6) is fixedly connected inside the second housing (16). A condenser (61) is connected to the output end of the compressor (6). An evaporator (62) is connected to the output end of the condenser (61). The evaporator (62) is fixedly connected inside the second pressure-bearing housing (13). The output end of the evaporator (62) is connected to the input end of the compressor (6).

8. The anti-condensation test chamber according to claim 7, characterized in that: A heat dissipation vent (17) is provided on the second housing (16) at the position corresponding to the condenser (61).

9. The anti-condensation test chamber according to claim 8, characterized in that: A second door (18) is hinged to the second housing (16), and a control panel (19) is fixedly connected to the second door (18). The control panel (19) is electrically connected to the pressure reducing valve (21), pressure gauge (22), first electric proportional valve (23), second electric proportional valve (3), heater (4), motor (5), compressor (6), dew point sensor (7) and differential pressure sensor (8).

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